# Calibre Sync vs Construction Calc

The clearest difference is price: Construction Calc at Free against Calibre Sync's $4.99. Calibre Sync's advantage is in-app purchases (none vs 1) and iOS requirement (15.0 vs 17.0). On ads and device support there is nothing between them.

Construction Calc is free to download; Calibre Sync costs $4.99 up front. Construction Calc sells 1 one-off in-app purchase. Calibre Sync asks for nothing beyond the download.

## The numbers

| Metric | Calibre Sync | Construction Calc |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[3.9 (55 ratings)](https://appshunter.io/ios/app/calibre-sync/id1609138078/reviews)** | — |
| Number of ratings | **55** | — |
| Positive reviews | 62.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Paid | — |
| Size | 128 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DUONG THUY PHAM](https://appshunter.io/developer/1795008858) | [EUTOPIX LABS](https://appshunter.io/developer/1896294696) |

## What reviewers say

### Calibre Sync

[App page](https://appshunter.io/ios/app/calibre-sync/id1609138078)

Access and manage your Calibre ebook libraries from various cloud services or wirelessly connect to your desktop. Browse, search, download, and organize your books on your device. Supports multiple libraries and accounts.

**Highlights:** Access Calibre libraries on cloud services, Wireless connection to Calibre, Supports multiple libraries and accounts, Browse, search, and download books, Organize books with filters and sorting, Send books to Kindle

**Features:** macOS Compatibility

**In-app purchases:** none


### Construction Calc

[App page](https://appshunter.io/ios/app/construction-calc-onsite-math/id6806845871)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Onsite Math Pro — Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Calibre Sync free?

Calibre Sync costs $4.99, with no in-app purchases.

### Is Construction Calc free?

Construction Calc is free to download, with in-app purchases available.

### Do Calibre Sync or Construction Calc have ads?

Neither Calibre Sync nor Construction Calc shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*